package com.yuexun.dhdoctor.module.meeting.zxing;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;


import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.yuexun.dhdoctor.R;
import com.yuexun.dhdoctor.module.meeting.ui.Act_MeetingCheck;
import com.yuexun.dhdoctor.zxing.camera.CameraManager;
import com.yuexun.dhdoctor.zxing.view.ViewfinderResultPointCallback;


import java.util.Vector;

public class MeetingCheckActivityHandler extends Handler {
	private static final String TAG = MeetingCheckActivityHandler.class.getSimpleName();

	  private final Act_MeetingCheck activity;
	  private final MeetingDecodeThread decodeThread;
	  private State state;

	  private enum State {
	    PREVIEW,
	    SUCCESS,
	    DONE
	  }

	  public MeetingCheckActivityHandler(Act_MeetingCheck activity, Vector<BarcodeFormat> decodeFormats,
	      String characterSet) {
	    this.activity = activity;
	    decodeThread = new MeetingDecodeThread(activity, decodeFormats, characterSet,
	        new ViewfinderResultPointCallback(activity.getViewfinderView()));
	    decodeThread.start();
	    state = State.SUCCESS;
	    // Start ourselves capturing previews and decoding.
	    CameraManager.get().startPreview();
	    restartPreviewAndDecode();
	  }

	  @Override
	  public void handleMessage(Message message) {
	    switch (message.what) {
	      case R.id.auto_focus:
	        //Log.d(TAG, "Got auto-focus message");
	        // When one auto focus pass finishes, start another. This is the closest thing to
	        // continuous AF. It does seem to hunt a bit, but I'm not sure what else to do.
	        if (state == State.PREVIEW) {
	          CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
	        }
	        break;
	      case R.id.restart_preview:
	        Log.d(TAG, "Got restart preview message");
	        restartPreviewAndDecode();
	        break;
	      case R.id.decode_succeeded:
	        Log.d(TAG, "Got decode succeeded message");
	        state = State.SUCCESS;
	        Bundle bundle = message.getData();
	        
	        /***********************************************************************/
	        Bitmap barcode = bundle == null ? null :
	            (Bitmap) bundle.getParcelable(MeetingDecodeThread.BARCODE_BITMAP);//���ñ����߳�
	        
	        activity.handleDecode((Result) message.obj, barcode);//���ؽ��
	        /***********************************************************************/
	        break;
	      case R.id.decode_failed:
	        // We're decoding as fast as possible, so when one decode fails, start another.
	        state = State.PREVIEW;
	        CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
	        break;
	      case R.id.return_scan_result:
	        Log.d(TAG, "Got return scan result message");
	        activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
	        activity.finish();
	        break;
	      case R.id.launch_product_query:
	        Log.d(TAG, "Got product query message");
	        String url = (String) message.obj;
	        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
	        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
	        activity.startActivity(intent);
	        break;
	    }
	  }

	  public void quitSynchronously() {
	    state = State.DONE;
	    CameraManager.get().stopPreview();
	    Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
	    quit.sendToTarget();
	    try {
	      decodeThread.join();
	    } catch (InterruptedException e) {
	      // continue
	    }

	    // Be absolutely sure we don't send any queued up messages
	    removeMessages(R.id.decode_succeeded);
	    removeMessages(R.id.decode_failed);
	  }

	  public void restartPreviewAndDecode() {
	    if (state == State.SUCCESS) {
	      state = State.PREVIEW;
	      CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
	      CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
	      activity.drawViewfinder();
	    }
	  }
}
